Coil Over Spring Hardware
Coil over suspensions consist of a spring mounted on the strut or shock body. The springs sit or are located by seats on the bottom and hats on the top. This is a similar arrangement as a stock strut but coil overs use a smaller diameter spring and the strut body is usually threaded for height adjustment. The top of a strut can also vary by manufacturer with the uppermost shock stem being manufactured in different ways that require special hardware. Our selection of spring seats, lock rings, and top hats has all been designed for use on various BMW coil over suspensions. Here you can find replacement parts for existing coil over kits and other spring hardware to complete your setup.
For accurate results, specify your model below.
These aluminum upper spring hats are for coil over struts with a 60mm coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 60mm | 16mm | tapered |
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These aluminum upper spring hats are for coil over struts with a 60mm coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 60mm | 14mm | square |
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These aluminum upper spring hats are for coil over struts with a 2.25" coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 2.25" | 16mm | tapered |
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This plastic ring fits between the spring and spring seat and acts as a buffer, reducing noise, vibration, and wear on the spring seat. These are designed to take abuse as the spring moves on the seat and should be considered a consumable. These are plastic and isolate the spring from hitting the aluminum seat and making noise. This will also reduce wear on the spring seat. These are sized for the 60mm spring seat found on Bilstein, H&R, Moton, MCS, and other coil over kits. Priced per ring and such a simple but effective part you should never be without! 
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These aluminum upper spring hats are for coil over struts with a 2.25" coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 2.25" | 14mm | square |
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H&R spanner wrenches for H&R coil over kits. This set consists of both a small wrench for the lock ring (68-75mm OD) and a large wrench for the actual perch (80-90mm OD).
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These aluminum upper spring hats are for coil over struts with a 2.5" coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 2.5" | 16mm | tapered |
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These aluminum upper spring hats are for coil over struts with a 2.5" coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 2.5" | 16mm | square |
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This is the lock ring that snugs up against the lower spring perch and prevent the perch from moving down (affecting the ride height). It's made from light weight aluminum and with a sprocket-type adjustment collar. This is a genuine Bilstein spring perch but should also work on H&R, Moton, MCS, and other coil over bodies with M52x1.5 thread size. These are sold per ring so order one per strut/shock.
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These aluminum upper spring hats are for coil over struts with a 2.25" coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 2.25" | 16mm | square |
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These aluminum upper spring hats are for coil over struts with a 60mm coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 60mm | 16mm | square |
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Bilstein Coil Over wrench for some PSS, PSS9 and PSS10 kits. Small wrench for adjusting the spring perch and lock ring on coil overs that require the M-F round pin style of adjuster (not rectangular inter-locking adjuster). May also be used with other coil over kits (H&R, Moton, JRZ, etc) that use a similar adjuster.
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These aluminum upper spring hats are for coil over struts with a 2.5" coil over spring. The specs are listed below; match the hat specs with your spring and strut. For a proper fitment you must confirm the spring hat matches the strut pin, especially on high-end motorsport struts. | Spring I.D. | Strut Pin Diam. | Strut Pin Seat |
| 2.5" | 14mm | square |
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This aluminum spring seat fits between upper and lower 60mm springs to "join" them together. Typically you would have a main spring on top and a tender or helper spring on the bottom (or vice-versa). The spring joiner, or locator ring, fits between the springs with a retaining lip on the inside. We like this design better than an outside spring joiner because it's lighter and there's no material sitting on the outside where a tire might come in contact with it. These are priced per pair.
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This is the lower spring seat for a coil over strut body and a 60mm I.D. spring. It's made from light weight aluminum and with a sprocket-type adjustment collar. This is a genuine Bilstein spring perch but should also work on H&R, Moton, MCS, and other coil over bodies with M52x1.5 thread size. These are sold per perch so order one per strut/shock.
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Bilstein Coil Over wrench set for some PSS, PSS9 and PSS10 kits. Consists of a Large wrench and a Small wrench for adjusting the spring perch (76.25mm) and lock ring (75.75mm) on coil overs that require the rectangular notch style head (not round pin style adjuster). Can also be used with other coil over kits (H&R, Moton, JRZ, etc).
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